Lathe having front and rear tool slides



3 Sheets-Sheet l w. HEINEMANN 11u-HN HAVING FRONT AND REAR Toor. sLIDEsFiled Nov. 15, 1927 Jan. 6, 1931.

Jan. 6,- -1931. A w. HEINEMANN ,1,788,294

LATHE HAVING FRONT AND REARTOOL SLIDES Fild Nov'. 15, 1927 ssheets-sheet 2 fis- fnl/511W WMe/71a 717471 f1 j, w71 y @7,4% www Jan.6, 1931. i w. HELNEMANN 1,788,294

LATHE HAVING FRONT AND REAR TOOL SLIDES Filed Nov. 15, 1927 3Sheets-Sheet 3 Patented Jan. V6, 1931 UNITED STATES PATENrfoFFl'c-E f IWILHELM HEINEMANN, or snfenonenn'. GEEMANY p LATHE HAVING rnoNfr ANDnnen Toor. sLInEsl Application med November 15,1192?, serial 233.458,and ia ser'many` June 21,1926.A

4 In the casey of machinertools, morepa'rtic-M Y Y ularly lathes, havingtool slides or carriers for longitudinal turning and-for facingseparately driven, the control of the drive is still usually done byhand, at least for some' of -theoperations, and careful attention isrequired' on the part ofthe workman to-preventdamage due to startingsomeoperation at the wrongtime.

' My linvention,providesmeans for the automatic control of thetraversing mechanism in such lathes, allowing also of alternativecontrol by hand, with an arrangement of control levers whereby whenthesame are moved in one'direction only one drive'can be effective, andwhen they are moved in the other direction only another,V drivecanfbecomeeffective, and I arrange also that with the control `lever inacentral position the support vcan be moved byvhand.

Tosave time in returning the supports, and allow of quick movementinboth directions, a quick drive is provided, put into operation bymoving the/control lever in one direction,'with a manually orautomatically actuated device which hasbeen operated for the purpose, asby means of a leverf actuated by an adjustable cam, which is drivenbythe v main "shaft, the lever having a gap, which allows the controllever to be moved into neutral position by a spring or gravity. 1

AWith the improved mechanism all movements of either or both supportscan take effect without mutual interference, and the quick drive can beput into operation automatically or manually. The forwardmovements ofthetwo Vsupports can be, proportioned to the dimensions of the work so thatthe two supports can finish together.

An example ofapparatus according to the invention is shown in theannexeddrawings, inwhichA o Fig. 1 is a longitudinal section on the`line A-A of Fig. 3, Y 45 Fig. 2 being a section on the line B--B` ofFig. 1, Y

Fig. 3 afront view of the headstock, t Fig. 4 afront view of part -ofthemecha-` nism to a larger scale, and Y Y Fig. 5 a sectional view onthis part.

.Theff shaft 1drives,'by^means of toothed gear ora chain, a spur` gear 2having worms 3 vand 31, which driveshafts 4 and 41`by means of wormwheels 5and 51. AThe shafts 4 and 41,'with all the parts thereon, arealike, the shaft 41 serving to actuatethe rear plane tool carrier,and-the shaft 4 serving to actuate` the forward tool carrier. AgearwheelG on theshaft 4` drives a gear wheel 7 and a shaft 8, connectedby gears 9 and 10 to a shaft 11.VV On the Alatter `is a pinion 12vmeshingV with the rack 13 Aof the sliding carrier 14. The shaft 41, bymeans of gears 61 and 71, drivesa shaft'81 which by means of bevel gears15 and 16 drives a shaft 17 and a shaft 18 perpendicular thereto. theshaft 18 `actuates the facing tool carrier. y Assuming for example thatthe longitudinal-"slide is to advance, a hollowA shaft surrounding theshaft 4 is axially moved so that a lnut 26 on it pushes a clutch 21 intoengagen'ientv with?V the continuously rotating worm wheel V5'.l'I`heshaftv25is'movedaxially by means offa lever .22,1` which is, whenrotated, moved axially by a' screw threaded sleeve 23 fixed to it,'andthen shiftsthe shaft 25 by means of a ball bearing 24.

Fig. 4 shows the lever 22 in position for the longitudinal traverse,with a square nose 28 bearing onapivoted pin 29,'.which can be rotatedby a lever 61. On rotation of this pin as indicated by the arrow. arecess ltherein releases the nose28 and llever 22, and the lever isrocked tothe rightby a spring 30 or weight 301 screwing thesleeve 23rearward and uncouplingthe'worm Wheel'from the shaft l4; Thedesired.action'mayy be obtainedeither kby means of a Vspring or bysuspending a weight, as best shown-in FigL'3, wherein when the rightdisconnecting lever 22 is employed, the action is occasioned by spring30whi1e when the left disconnecting lever 221 is employed the action isthrough the weight 301.

Automatic release by lthe pin 29 can lbe effected by the movement cfatappet 32,.ad justable on a rotating disc l31 driven by a gearwheel 37andthe shaftl 11. `A disc 311k for the facing tool traverse is driven bygear wheels 34, 35,36 and the shaft 81.4 When the t tappet 32 strikesanose 33 on the pin 32 the A pinion 19 onV -move quickly in bothdirections, thelever 22 is rocked to theright. Thedriving pulley'38drives a shaft 39 connected b-y bevel gear drive 40, 41, 42, 43 (theelement 43 being a clutch-coupling) tothe hol-low yshaft 44, .the driveVbeing put into engagement bya lever 59 (Fig. 2) androd 66.- A wheel450m the;

shaft 44 then drives .wheels 46, 461 which are rotatable on-longs'leeves 25, 251 splined'to the shafts 4, 4%. I will describextheactionas' it occurs when only the longitudinal slide is to make a .quickmovement.

The lever 22 being rocked tothe right, 'the sleeve 23 andbally bearing47 act on the nut 48, yand Va nut. 49 pushes .a friction disc 50 againstthe wheel 46, which is thus pressed against a friction disc-51, with theball ring 52 `'bearing.against a flange 53.

kmoved inthe vdirection lindicated'rby the arrow b by hand, orautomatically .by lthe spring 30for which the weight 3O1may besubstituted. For the latter purpose there is a pawl 54, which can rotatethrough approximately .360o facing a nose 55 on aspring actuated ring56. The purpose of the ring 56 is, by means of the spring actingthereon'and the lug 55 mounted thereon, Ito prevent the iever,whenpawl54-is engaged as-shown on Fig. 4 fromv automatically rotating in thedirection-lof arrow VI) when vfor any .reason it. is lnot desired toVproducethe automatic emergency of the -slides after terminatedad-Vance. Y rl.` lie1'efore, insuch Linstances if the pawl 54 is engagedyasy shownby the position ofthe right :lever 22 of Fig'. 3 the'collar 56exerts no influence. VrThe spring 30 or lweight 301 is out of actionwhen the pawl is inthe left-.hand position shown, but when the pawl isrocked througlrlSOo'the spring pulls the' lever 22 over to the.I rightas soon as the traverse is to start,.or.a weight `301 operates for thesame purpose by means of acord, :as

Vshown in connection with the lever A221. The

pro-perposition of the .ring 56 is secured by the second nose 57. Thepurpose of the pawl 54 is as follows As shown in Fig. 4, it is engagedin this position, the ring 56, which Vis subject to spring action`prevents the. lever 22from bei-ng moved by its spring or prevents theweight acti-ng thereon frommoving in the direction ofthe arrow "bwhereby emergency reverse takes placeV throughthe action of wheels 46see Fig. 1). If it is desired to use the pawlin this position onemergency travel l (see Fig. 4,) the lever must be moved by hand in the.direction of the arrow Zaand the spring power 4ofvring 56 thusovercome. Y When theV The shaft 4f being keyed to the sleeve 25 the fastdrive isf vtransmitted to the Vrack'13. The .lever 22is iffsnsggaA pawl54 is swung out .approximately 360C Y press againstthe constantlyrotating thrust gear 46 and emergency Yoperation takes place 'Sandbringsfthefslideinto-the "initial position.

'lo Y'uncouple the quick-traverse gear the lever 22 is vmoved by yhandto the cent-ral, or

Vthis is doneY automatically bya tappet 58 on thedisc 31,

lever.

this tappet striking 'a nose on the As will be seen, rthenormal'traversefand quick traversing gears -can never be; coupled together. o If Lby'oversight .the tappet -32 has not been adjusted thelongitudinal slideis automatically stopped in vits extreme left hand position .byVstriking lthe .lever 61v connectedto thepin l29..and ,rocking it .inthedirection indicatedby the arrow c. T1 Ifkthe control is to beefpfec edbyhand when the Ylever 22 is in its central position, hand wheels62,1621 on thezshafts 4,1and LE-.are

rotated zfor the purpose; cranks may besubstituted these wheelsn. Thetraverse .ofthe slides-can beregulated as required by means of thechange heels 6,7 and 61,171. 'Y v What I claim-is: 1. In alathe-fhavingfront and .rear tool slides, .the combination with each oftwo continuously driven .auxiliary shafts for moving the slides, one fortransverse feed, and one forquiclr returnl of acontrol lever, a screwthreaded sleeve on said control lever, .a main shaft, a worin wheeldriven Vley-:said main shaft, .a clutch actuated by. the saidA :sleevewhen the Acontrol lever is rocked infone direc-` tion to couple .theworm'wheel tothe main shaft-for actuating the respective slide in itstraversing feed,a frictionclutch for vdriving thegauii'liaryshaftiforquickreturn of the corresponding slide',y a gearwheel mounted on `thesaidauxiliaryshaftand engaging with said frictionv clutch, .andreversing. gear. driving thesaid gear wheel, moveinentof the .controllever in the other direction causingy the ils threaded sleeve touncouple the worm wheel and tov couple the friction clutch to the vgearwheel for the quick return, the vcontrol lever when in .its centralvpositionieaving the gears free for manual Voperation of Vthe slide bymeans of the same gears.`

2. AV lathe apparatus as in claim'1,.com; i

.prising ahdiscy rotating with the "auxiliary shaft, adjustable tappetson thesaid ,disc for automatically effecting the disengagement of thetraversing and quick returnclutches, a lever actuated by thetappet forthe traversing. movement,v and also actuated by hand, a pin having arecessgtherein and adaptedto be movedbyjsaid last lmentioned `l=^,verfor nizo V quick return clutch.l

